使用Justice检验的优势是：提供的错误信息要比JVM提供的信息更详细(包括堆栈状态和部分问题代码)。

Using Justice validation had the advantage of providing much more detailed information about errors than is supplied by the JVM (including the stack state and a portion of the problem code).

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由于类构造函数中的调用堆栈状态的定义不完善，所以放置在构造函数中的堆栈步重写可能会产生意外结果。

Because the state of the call stack in a class constructor is not well defined, stack walk overrides placed in constructors can produce unexpected and undesired results.

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运行该测试页面，可以看到历史记录按钮反映了历史堆栈的状态(见图2)。

Running this test page should show us how the history buttons react to the state of the history stack (see Figure 2).

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